Histologic Diagnosis of Inflammatory Skin Diseases

Images

…11.18.1B: Large amount of mucin in company with scattered spindle- and stellate-shaped fibrocytes, as well as mast cells = Scleromyxedema, early ¬†This is an early lesion because mucin is so abundant in the reticular dermis. A synonym for the cond…

Differential Diagnosis in Dermatopathology

Pretibial myxedema vs. Scleromyxedema

A systemic disease, which manifests itself in the skin first as violaceous macules and patches that tend to progress to papules and plaques, and sometimes to nodules and tumors, all of which represent hyperplasia of endothelial cells….

Dermatology Practical & Conceptual

Pigmented Lesions

…early in the course) in a mass in the reticular dermis, those cells appearing to be splayed between thickened bundles of collagen at the lateral margins. Melanin increased in amount in the epidermis. Hamartomas Collagenous nevus, papillary dermal…

Dermatology Practical & Conceptual

Melanoma and satellite blue papule

…seborrheic keratosis, including lichen planus-like keratosis, hemangioma, pigmented basal cell carcinoma, hemosiderotic dermatofibroma, Kaposi sarcoma and angiosarcoma. Finally, exogenous dermal blue pigmentation, such as ink tattoo, radiation tattoo…

Differential Diagnosis in Dermatopathology

Discussions

In addition to possessing some cells with extraordinarily atypical nuclei, those referred to colloquially as “monster” cells, the two pathologic processes of very different nature that are the basis for this particular exercise in differ…

Differential Diagnosis in Dermatopathology

Discussions

…e lesions made up of dense diffuse infiltrates of mesenchymal cells in company with bundles of collagen, the two together occupying at least much of the thickness of the dermis and sometimes part of the subcutaneous fat. Nuclei are not atypical as a…

Histologic Diagnosis of Inflammatory Skin Diseases

A systemic disease, which manifests itself in the skin first as violaceous macules and patches that tend to progress to papules and plaques, and sometimes to nodules and tumors, all of which represent hyperplasia of endothelial cells….

Differential Diagnosis in Dermatopathology

Dermatofibroma with "monster" cells vs. Malignant fibrous histiocytoma

A systemic disease, which manifests itself in the skin first as violaceous macules and patches that tend to progress to papules and plaques, and sometimes to nodules and tumors, all of which represent hyperplasia of endothelial cells….